4.14-stable review patch. If anyone has any objections, please let me know.
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From: Clint Taylor clinton.a.taylor@intel.com
commit 0ca9488193e61ec5f31a631d8147f74525629e8a upstream.
On GLK NUC platforms the HDMI retiming buffer needs additional disabled time to correctly sync to a faster incoming signal.
When measured on a scope the highspeed lines of the HDMI clock turn off for ~400uS during a normal resolution change. The HDMI retimer on the GLK NUC appears to require at least a full frame of quiet time before a new faster clock can be correctly sync'd. Wait 100ms due to msleep inaccuracies while waiting for a completed frame. Add a quirk to the driver for GLK boards that use ITE66317 HDMI retimers.
V2: Add more devices to the quirk list V3: Delay increased to 100ms, check to confirm crtc type is HDMI. V4: crtc type check extended to include _DDI and whitespace fixes v5: Fix white spaces, remove the macro for delay. Revert the crtc type check introduced in v4.
Cc: Imre Deak imre.deak@intel.com Cc: stable@vger.kernel.org # v4.14+ Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105887 Signed-off-by: Clint Taylor clinton.a.taylor@intel.com Tested-by: Daniel Scheller d.scheller.oss@gmail.com Signed-off-by: Radhakrishna Sripada radhakrishna.sripada@intel.com Signed-off-by: Imre Deak imre.deak@intel.com Reviewed-by: Imre Deak imre.deak@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20180710200205.1478-1-radhakri... (cherry picked from commit 90c3e2198777aaa355b6994a31a79c636c8d4306) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_ddi.c | 13 +++++++++++-- drivers/gpu/drm/i915/intel_display.c | 21 ++++++++++++++++++++- drivers/gpu/drm/i915/intel_drv.h | 3 +-- 4 files changed, 33 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1183,6 +1183,7 @@ enum intel_sbi_destination { #define QUIRK_BACKLIGHT_PRESENT (1<<3) #define QUIRK_PIN_SWIZZLED_PAGES (1<<5) #define QUIRK_INCREASE_T12_DELAY (1<<6) +#define QUIRK_INCREASE_DDI_DISABLED_TIME (1<<7)
struct intel_fbdev; struct intel_fbc_work; --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1526,15 +1526,24 @@ void intel_ddi_enable_transcoder_func(co I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp); }
-void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv, - enum transcoder cpu_transcoder) +void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state) { + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder); uint32_t val = I915_READ(reg);
val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK | TRANS_DDI_DP_VC_PAYLOAD_ALLOC); val |= TRANS_DDI_PORT_NONE; I915_WRITE(reg, val); + + if (dev_priv->quirks & QUIRK_INCREASE_DDI_DISABLED_TIME && + intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) { + DRM_DEBUG_KMS("Quirk Increase DDI disabled time\n"); + /* Quirk time at 100ms for reliable operation */ + msleep(100); + } }
bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5653,7 +5653,7 @@ static void haswell_crtc_disable(struct intel_ddi_set_vc_payload_alloc(intel_crtc->config, false);
if (!transcoder_is_dsi(cpu_transcoder)) - intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder); + intel_ddi_disable_transcoder_func(old_crtc_state);
if (INTEL_GEN(dev_priv) >= 9) skylake_scaler_disable(intel_crtc); @@ -14286,6 +14286,18 @@ static void quirk_increase_t12_delay(str DRM_INFO("Applying T12 delay quirk\n"); }
+/* + * GeminiLake NUC HDMI outputs require additional off time + * this allows the onboard retimer to correctly sync to signal + */ +static void quirk_increase_ddi_disabled_time(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = to_i915(dev); + + dev_priv->quirks |= QUIRK_INCREASE_DDI_DISABLED_TIME; + DRM_INFO("Applying Increase DDI Disabled quirk\n"); +} + struct intel_quirk { int device; int subsystem_vendor; @@ -14372,6 +14384,13 @@ static struct intel_quirk intel_quirks[]
/* Toshiba Satellite P50-C-18C */ { 0x191B, 0x1179, 0xF840, quirk_increase_t12_delay }, + + /* GeminiLake NUC */ + { 0x3185, 0x8086, 0x2072, quirk_increase_ddi_disabled_time }, + { 0x3184, 0x8086, 0x2072, quirk_increase_ddi_disabled_time }, + /* ASRock ITX*/ + { 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time }, + { 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time }, };
static void intel_init_quirks(struct drm_device *dev) --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1254,8 +1254,7 @@ void intel_ddi_init(struct drm_i915_priv enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder); bool intel_ddi_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe); void intel_ddi_enable_transcoder_func(const struct intel_crtc_state *crtc_state); -void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv, - enum transcoder cpu_transcoder); +void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state); void intel_ddi_enable_pipe_clock(const struct intel_crtc_state *crtc_state); void intel_ddi_disable_pipe_clock(const struct intel_crtc_state *crtc_state); struct intel_encoder *